Improvement in apparatus for evaporating saccharine juices



D. l. DURFEY.

Evaporating Pan.

n Patented May 17, 1859.

Inventor: `@faQ/.Zag

PHOTO-L THO.CU.N.Y. (OSBORNE'S PROCESS l Witnesses,

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@Ntra raras PATENT eine DANIEL INGHAM DURFEY, OF ORO'ION, OHIO.

IMPROVEMENT IN APPARATUS FOR EVAPORATING SYACCHARINE JUICES.

Spccilication forming part of Letters Patent No. :MAPRQL dated May 17,1559.

Z'o alt' whom if; 71mg/ concer. I: i

Be it known that I, DANIEL INGHAM DUR- FEY, of Groton, Licking county,Ohio, have invented new and useful Improvements in4 j tion thereof.

The pans A l 2 3 4t 5 are rectangular in form, and are so set in themasonry ofthe furnace G as to form an inclined range, commencing withthe final concentrator or teache7 5, and thence rising, step by step, tothe clariiier A, which receives the crude juice from the mill. SluicesE, placed alternately on the right and left, down the range, enable theconcentrated sirup to be drawn off from the bottom of each pan to thatof its immediate successer in the range, their alternate arrangementpreventing a too direct discharge of sirup in ease several slnicesshould be open at once. A small portion of thebottom of each pan on itsdischarging side is made of equal depth with its immediate successor inthe range, so as to create a circulation in which the more concentratedjuice, as fast as formed, flows into the well thus provided, and, havingonly a very small portion or surface of its' volume presented to theaction of the fire, is thereby saved from being burned or caramelized,while at the same time the less concentrated juice may be exposed in athin or shallow sheet or film to the action of the llame ih often oreonstantlyrenewed installments, which is, under the conditions orcircumstances, found most effective for uniform evaporation. The juice,in passing from the clarifier A to the pan l, is caught in a strainer,D, which, arresting the grosser portions of the scum and feculentmatters, enables them to be ladled back again into the clarifier.

G is the nre-place; G, its doors.

H is a damper adapted to be slid beneath the bottom ot' the teache 5.This damper is 1 used in several different ways, according to thechanging requirements of the siru p. When an excessive heat is requiredto the bottom of the teaehe, as at the first commencement, the damper His withdrawn entirely and its place of insertion in the fire-frontclosed by a door,

Vhen the damper is inserted inversely to the position represented in thedrawings, it modifies the heat and presents it to the bottom of the panat a uniform temperature throughout the entire surface. Vhen it isnecessary for the juice or sirup in the teache to be protected whollyfrom the action of the fire-as for cooling down before drawing offthedamper is inserted in the position shown in the sectional View, so as,while excluding the fire, to admit astream of cold air between thedamper and the teache bottom, as indicated by arrow. The damper H canalso be used to contract the mouth ot' the flue K, so as to damp thefire and to reduce the temperature of the flue beneath the upper pans.The top of the flue K is formed by the gradually-ascending surfaces ofthe bottoms of the upper pans, and

the bottom ofthe liuc K, being parallel there-v to, has a correspondingshape. This form and arrangement of the l'lue facilitates the draft andholds the heated products of combustion well up to the pans. The upperpart of the iue, immediately beneath the clarifier, has a transversepartiti-on, L. It has also on each side a rectangular opening orpassage, O, to the external air. Each opening O is guarded by a valve,I), which may be hinged to the outside of the flue, as shown.

Hinged to the partition L is a damper, Q, corresponding to the Wholearea of the flue at thisplace. The air-valves P and damper Q areconnected together by links R, so that an opening of the air-passage Ois, by means ot' the rods S, accompanied by a corresponding closure or.partial closure of the damper Q, and vice versa. These simultaneousmovements of the damper Q and air-valves P act very effectually to cooldown the contents of the clarifier, so as, as much as possible, todischarge only clear liquor into the pan 2.

M is a flue-door.

N is the smoke-stack.

This apparatus under careful management produces sirup free from alltaint of scorching, being of a pale amber or golden hue,comparable tonew honey. f

I claim herein as new and of my inventionl. Adeseending` series ofevaporating-pans, 3. The strainer D in the described combieaeh having nWell or depression on the side nation with the clarifier A, operating inthe next its immediate successor in the range, manner and for thepurpose set forth.

eloszrble by sluiees, substantially as set forth. In testimony of whichinvention I hereunto 2. The arrangement of the sluiees B alterset myhand.

nately on the right and left of the range,when DANIEL I.- DURFEY. usedin the described combination with the Nitnessesz wells or depressionsabove referred to, for the l WM. F. SCOVEL,

\ ANsoN CLARK.

purpose set forth.

